Control Module for a Lighting Fixture

ABSTRACT

A control module attached to a lighting fixture and having a front cover portion may comprise one or more sensors, such as a daylight and/or occupancy sensor, for sensing information through the front cover portion. The control module may have a main printed circuit board (PCB) that extends from a front side to a rear side of the control module, and a sensor PCB perpendicular to the main PCB to enable at least one sensor attached to the sensor PCB to face the front side of the control module. The main PCB may comprise a wireless communication circuit and an antenna for communicating radio frequency (RF) signals, wherein at least a portion of the antenna is located within a plastic lip of the front cover portion of the control module. The control module may further have a conductive enclosure to reduce radio-frequency interference noise from coupling into the antenna.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.16/551,315, filed Aug. 26, 2019, which is a continuation of U.S. patentapplication Ser. No. 15/970,000, filed on May 3, 2018, now U.S. Pat. No.10,398,007, issued Aug. 27, 2019, which claims priority to ProvisionalU.S. Patent Application No. 62/502,357, filed May 5, 2017, the entiredisclosures of which are incorporated by reference herein.

BACKGROUND

A user environment, such as a residence or an office building forexample, may be configured using various types of load control systems.A lighting control system may be used to control the lighting loads inthe user environment. A motorized window treatment control system may beused to control the natural light provided to the user environment. Aheating, ventilation, and air-conditioning (HVAC) system may be used tocontrol the temperature in the user environment.

Each load control system may include various control devices, includinginput devices and load control devices. The load control devices mayreceive digital messages, which may include load control instructions,for controlling an electrical load from one or more of the inputdevices. The load control devices may receive the digital messages viaradio frequency (RF) signals. Each of the load control devices may becapable of directly controlling an electrical load. The input devicesmay be capable of indirectly controlling the electrical load via digitalmessages transmitted to the load control device.

The load control system may have various types of load control devicesinstalled therein, such as lighting control devices (e.g., dimmerswitches, electronic switches, ballasts, or light-emitting diode (LED)drivers), motorized window treatments, temperature control devices(e.g., a thermostat), AC plug-in load control devices, and/or the like.The load control system may also have various input devices installedtherein, such as remote control devices, occupancy sensors, daylightsensors, temperature sensors, and/or the like. The greater the number ofload control devices and input devices in a load control environment,the less aesthetically pleasing the load control environment may be to auser.

Implementing each of these load control devices and input devicesseparately in a load control environment can cause a large number ofdevices to be installed and configured in the load control system. Asthese load control devices and input devices generally communicate viaRF signals, the implementation of multiple input devices for controllinga number of load control devices can cause increased network traffic,which increases the chances of network inefficiencies. Additionally, thecommunication of sensed information via RF signals may cause a delay inthe time it takes to control an electrical load in response to thesensed information.

SUMMARY

As described herein, a control module may be attached to a lightingfixture. The control module may comprise one or more sensors. The one ormore sensors may include a daylight sensing circuit and/or an occupancysensing circuit. The one or more sensors may sense information through afront cover portion of the control module. For example, the front coverportion may include a light pipe configured to receive daylight for thedaylight sensing circuit and/or a lens configured to receive infraredenergy for the occupancy sensing circuit.

The control module may have a main printed circuit board (PCB) thatextends from a front side of the control module to a rear side of thecontrol module. The main PCB may comprise a wireless communicationcircuit and a loop antenna for communicating radio frequency (RF)communication signals via the wireless communication circuit. The loopantenna may be located on the main PCB such that at least a portion oftransmit/receive portions of the loop antenna are located within aplastic lip of the front cover portion of the control module when thecontrol module is attached to a metal lighting fixture.

The control module may include a sensor PCB that is attachedperpendicular to the main PCB to enable at least one sensor attached tothe sensor PCB to face the front side of the control module. The sensorPCB may be attached to the main PCB with a solder joint. The solderjoint may be located a predefined distance from a surface mountplug/socket pair that supports an electrical connection between the mainPCB and the sensor PCB. The lens on the front cover portion of thecontrol module may cover the occupancy sensing circuit installedthereon. The light pipe on the front cover portion may receive light forthe daylight sensing circuit and may provide feedback from a feedbacklight emitting diode (LED).

The main PCB may comprise a communication link connector configured toreceive a connection to a communication bus for communicating lightingcontrol instructions to the lighting control device. The main PCB maycomprise a control circuit configured to generate lighting controlinstructions in response to sensed information from the at least onesensor and send the lighting control instruction to the lighting controldevice via the communication bus.

The control module may comprise a rear cover portion. The main PCB maycomprise programming contacts that extend through the rear cover portionfor programming the control module. The front cover portion may comprisea configuration button configured to cause the control module to enteran association mode or a discovery mode for programming the controlmodule after the control module is installed in the lighting fixture.

The control module may further be configured to insert into a conductiveenclosure. The conductive enclosure may have one or more springsconfigured to attach the control module to the metal lighting fixture.The springs may be bent away from the conductive enclosure and mayfurther comprise a reverse angle edge cut. The reverse angle edge cutmay draw the conductive enclosure and control module closer to the metallighting fixture. The reverse angle edge cut may further dig into themetal lighting fixture and may provide conductive contact between theconductive enclosure and the metal lighting fixture. The conductiveenclosure may further comprise one or more conductive flanges configuredto abut the metal lighting fixture to reduce an amount ofradio-frequency interference.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram depicting an example load control system thatincludes lighting control devices.

FIGS. 2A and 2B are perspective views depicting an example controlmodule for a lighting control device.

FIGS. 3A-3F are orthographic views depicting different sides of theexample control module shown in FIGS. 2A and 2B.

FIG. 4 is an enlarged side cross-section view of the example controlmodule shown in FIGS. 2A and 2B.

FIG. 5 is a partially exploded view of the example control module shownin FIGS. 2A and 2B.

FIGS. 6A-6C are perspective views depicting the example control moduleshown in FIGS. 2A and 2B, without a front cover portion or a rear coverportion.

FIG. 6D is perspective view depicting another example control module fora lighting control device.

FIGS. 7A and 7B are perspective views of the depicting another examplecontrol module for a lighting control device, where the control modulehas a conductive enclosure.

FIGS. 8A and 8B are partially exploded view of the example controldevice and conductive enclosure shown in FIGS. 7A and 7B.

FIGS. 9A-9D are orthographic views depicting different sides of theconductive enclosure shown in FIGS. 7A and 7B.

FIG. 10 is a block diagram of an example control module connected to alighting control device.

DETAILED DESCRIPTION

FIG. 1 depicts an example of a representative load control system 100.As shown in FIG. 1, a room 102 in a building may be installed with oneor more lighting fixtures 138 a, 138 b, 138 c, 138 d. Each lightingfixture 138 a, 138 b, 138 c, 138 d may include a lighting load (e.g., anLED light source) and a respective lighting control device (e.g., an LEDdriver, ballast, dimming or switching module, or any combination of suchdevices) for controlling the respective lighting load of the lightingfixture 138 a, 138 b, 138 c, 138 d. The lighting control devices may becontrol-target devices capable of controlling a respective lighting loadin response to control instructions received in digital messages.

The room 102 may include one or more control-source devices that may beused to control the lighting fixtures 138 a, 138 b, 138 c, 138 d.Control-source devices may be input devices capable of communicatingdigital messages to control-target devices. The control-source devicesmay send digital messages for controlling (e.g., indirectly controlling)the amount of power provided to a lighting load by transmitting digitalmessages to the lighting control device. The digital messages mayinclude control instructions (e.g., load control instructions) oranother indication that causes the lighting control device to determineload control instructions for controlling a lighting load.

The control-source devices may include a wired or wireless device. Anexample control-source device may include a remote control device 116.The remote control device 116 may communicate with control-targetdevices, such as the lighting control devices in the lighting fixtures138 a, 138 b, 138 c, 138 d, via a wired and/or a wireless communicationlink. For example, the remote control device 116 may communicate viaradio frequency (RF) signals 172. The RF signals 172 may be transmittedvia any known RF communication technology and/or protocol (e.g., nearfield communication (NFC); BLUETOOTH®; WI-FI®; ZIGBEE®, a proprietarycommunication channel, such as CLEAR CONNECT™, etc.). The remote controldevice 116 may be attached to the wall or detached from the wall.Examples of remote control devices are described in greater detail inU.S. Pat. No. 8,598,978, issued Dec. 3, 2013, entitled METHOD OFCONFIGURING A TWO-WAY WIRELESS LOAD CONTROL SYSTEM HAVING ONE-WAYWIRELESS REMOTE CONTROL DEVICES; and U.S. Pat. No. 9,361,790, issuedJun. 7, 2016, entitled REMOTE CONTROL FOR A WIRELESS LOAD CONTROLSYSTEM, the entire disclosures of which are hereby incorporated byreference.

The load control system 100 may include control modules, such as controlmodules 120 a, 120 b, 120 c, 120 d. The control modules 120 a, 120 b,120 c, 120 d may each be attached to a respective lighting fixture 138a, 138 b, 138 c, 138 d. The control modules 120 a, 120 b, 120 c, 120 dmay each be electrically connected to a respective lighting controldevice within the lighting fixtures 138 a, 138 b, 138 c, 138 d forcontrolling lighting loads. The control modules 120 a, 120 b, 120 c, 120d may include one or more sensors (e.g., sensing circuits) forcontrolling the lighting loads within the respective lighting fixtures138 a, 138 b, 138 c, 138 d. For example, the control modules 120 a, 120b, 120 c, 120 d may include an occupancy sensor (e.g., an occupancysensing circuit) and/or a daylight sensor (e.g., a daylight sensingcircuit). The control modules 120 a, 120 b, 120 c, 120 d may becontrol-source devices that transmit digital messages to respectivelighting control devices to which they are connected (e.g., on a wiredcommunication link). The control modules 120 a, 120 b, 120 c, 120 d mayalso, or alternatively, be control-target devices for receiving digitalmessages from other devices in the system, such as the remote controldevice 116 or another control-source device, (e.g., on a wirelesscommunication link via the RF signals 172) for controlling therespective lighting control devices to which they are connected.

The occupancy sensors in the control modules 120 a, 120 b, 120 c, 120 dmay be configured to detect occupancy and/or vacancy conditions in theroom 102 in which the load control system 100 is installed. The controlmodules 120 a, 120 b, 120 c, 120 d may control the lighting controldevices in the respective lighting fixtures 138 a, 138 b, 138 c, 138 din response to the occupancy sensors detecting the occupancy or vacancyconditions. The occupancy sensor may operate as a vacancy sensor, suchthat digital messages are transmitted in response to detecting a vacancycondition (e.g., digital messages may not be transmitted in response todetecting an occupancy condition). Examples of load control systemshaving occupancy and/or vacancy sensors are described in greater detailin U.S. Pat. No. 8,009,042, issued Aug. 10, 2011, entitledRADIO-FREQUENCY LIGHTING CONTROL SYSTEM WITH OCCUPANCY SENSING; U.S.Pat. No. 8,199,010, issued Jun. 12, 2012, entitled METHOD AND APPARATUSFOR CONFIGURING A WIRELESS SENSOR; and U.S. Pat. No. 8,228,184, issuedJul. 24, 2012, entitled BATTERY-POWERED OCCUPANCY SENSOR, the entiredisclosures of which are hereby incorporated by reference.

The daylight sensors in the control modules 120 a, 120 b, 120 c, 120 dmay be configured to measure a total light intensity in the visible areaof the room 102 in which the load control system 100 is installed. Thecontrol modules 120 a, 120 b, 120 c, 120 d may control the lightingcontrol devices in the respective lighting fixture 138 a, 138 b, 138 c,138 d in response to the light intensity measured by the respectivedaylight sensor. Examples of load control systems having daylightsensors are described in greater detail in U.S. Pat. No. 8,410,706,issued Apr. 2, 2013, entitled METHOD OF CALIBRATING A DAYLIGHT SENSOR;and U.S. Pat. No. 8,451,116, issued May 28, 2013, entitled WIRELESSBATTERY-POWERED DAYLIGHT SENSOR, the entire disclosures of which arehereby incorporated by reference.

The load control environment 100 may include a system controller 160operable to transmit and/or receive digital messages via wired and/orwireless communications. For example, the system controller 160 may beconfigured to transmit and/or receive the RF communication signals 172,to communicate with one or more control devices (e.g., control-sourcedevices and/or control-target devices, such as the control modules 120a, 120 b, 120 c, 120 d). The system controller 160 may communicatedigital messages between associated control devices. The systemcontroller 160 may be coupled to one or more wired control devices(e.g., control-source devices and/or control-target devices) via a wireddigital communication link.

The system controller 160 may also, or alternatively, communicate via RFcommunication signals 170 (e.g., NFC; BLUETOOTH®; WI-FI®; cellular; aproprietary communication channel, such as CLEAR CONNECT™, etc.). Thesystem controller 160 may communicate over the Internet 164, or othernetwork, using RF communication signals 170. The RF communicationsignals 170 may be transmitted using a different protocol and/orwireless band than the RF communication signals 172. For example, the RFcommunication signals 170 may be transmitted using WI-FI® or cellularsignals and the RF communication signals 172 may be transmitted usinganother RF communication protocol, such as BLUETOOTH®, ZIGBEE®, or aproprietary communication protocol. The RF communication signals 170 maybe transmitted using the same protocol and/or wireless band as the RFcommunication signals 172. For example, the RF communication signals 170and the RF communication signals 172 may be transmitted using WI-FI® ora proprietary communication protocol.

The system controller 160 may be configured to transmit and receivedigital messages between control devices. For example, the systemcontroller 160 may transmit digital messages to the lighting controldevices in the lighting fixtures 138 a, 138 b, 138 c, 138 d in responseto the digital messages received from the remote control device 116. Thesystem controller 160 may transmit digital messages to the controlmodules 120 a, 120 b, 120 c, 120 d (e.g., in response to the digitalmessages received from the remote control device 116). The digitalmessages may include association information for being stored at thecontrol devices and/or control instructions for controlling a lightingload.

The load control system 100 may be commissioned to enable control of thelighting loads in the lighting fixtures 138 a, 138 b, 138 c, 138 d basedon commands communicated from the control devices (e.g., the remotecontrol device 116, the control module 120 a, 120 b, 120 c, 120 d, etc.)configured to control the lighting loads. For example, the remotecontrol device 116 may be associated with the lighting control deviceswithin the lighting fixtures 138 a, 138 b, 138 c, 138 d and/or thecontrol modules 120 a, 120 b, 120 c, 120 d. Association information maybe stored on the associated devices, which may be used to communicateand identify digital commands at associated devices for controllingelectrical devices in the system 100. The association information mayinclude the unique identifier of one or more of the associated devices.The association information may be stored at the control devices, or atother devices that may be implemented to enable communication and/oridentification of digital commands between the control devices.

A network device 128 may be in communication with the system controller160 for commissioning the load control system 100. The network devicemay include a wireless phone, a tablet, a laptop, a personal digitalassistant (PDA), a wearable device (e.g., a watch, glasses, etc.), oranother computing device. The network device 128 may be operated by auser 132. The network device 128 may communicate wirelessly by sendingdigital messages on RF communication signals 170 (e.g., WI-FI® signals,WI-MAX® signals, cellular signals, etc.). The network device 128 maycommunicate digital messages in response to a user actuation of one ormore buttons on the network device 128. The network device 128 maycommunicate with the system controller 160 using digital messagestransmitted via RF communication signals 170 (e.g., WI-FI® signals,WI-MAX® signals, cellular signals, etc.). Examples of load controlsystems having WI-FI®-enabled devices, such as smart phones and tabletdevices, are described in greater detail in U.S. Patent ApplicationPublication No. 2013/0030589, published Jan. 11, 2013, entitled LOADCONTROL DEVICE HAVING INTERNET CONNECTIVITY; and U.S. Pat. No.9,413,171, issued Aug. 9, 2016, entitled NETWORK ACCESS COORDINATION OFLOAD CONTROL DEVICES, the entire disclosures of which are incorporatedherein by reference.

The load control system 100 may be commissioned for enabling control ofthe lighting loads in the load control system 100. The commissioning ofthe load control system 100 may include associating control devices,which may include control-source devices and/or control-target devices.A load control discovery device 190 may perform discovery and/orassociation of control devices with the system controller 160. Oncecontrol devices are associated, control-source devices may send digitalmessages to control-target devices to perform control of the lightingloads in the load control system 100. For example, the associated remotecontrol device 116 may send digital messages to the control modules 120a, 120 b, 120 c, 120 d to instruct the respective lighting controldevices of the lighting fixtures 138 a, 138 b, 138 c, 138 d to increaseor decrease the lighting level of the respective lighting loads.

The location of control devices may be discovered relative to thelocation of other control devices in the load control environment 100.As shown in FIG. 1, control devices (e.g., control-source devices and/orcontrol-target devices) may send a message within a discovery range 134that may be received by other control devices within the discovery range134. The message may be a dedicated discovery message that may beidentified by a receiving device as a discovery message or anothermessage that may be transmitted in the load control environment 100 andmay be interpreted as a discovery message. For example, the message maybe an association message for associating devices in the load controlenvironment 100, and/or the message may be a control message forcontrolling devices in the load control environment 100.

A control device that sends a discovery message (e.g., dedicateddiscovery message or a message otherwise interpreted as a discoverymessage) may be identified as a load control discovery device 190. FIG.1 shows an example in which a control-source device (e.g., remotecontrol device 116) is assigned as the load control discovery device 190that may send a discovery message within discovery range 134, thoughother control devices may be assigned as the load control discoverydevice 190. The discovery range 134 may correspond to a transmissionpower (e.g., an adjustable transmission power) of the load controldiscovery device 190. The discovery message sent by the load controldiscovery device 190 may be received by other devices, such as othercontrol devices and/or the system controller 160.

The control devices (e.g., the control modules 120 a, 120 b, 120 c, 120d) may receive the discovery message and determine whether the discoverymessage is received at a signal strength that is above a reception powerthreshold (e.g., a predefined signal strength). The control devices thatreceive the discovery message may report the receipt of the discoverymessage. The control devices that receive the discovery message mayreport the received signal strength of the discovery message to thesystem controller 160. The control devices that received the discoverymessage may be provided to the network device 128. The network device128 may display the discovered control devices to the user 132 forassociation with a location and/or other control devices.

The control devices (e.g., the control modules 120 a, 120 b, 120 c, 120d) within the discovery range 134 may respond to a discovery messagetransmitted from the load control discovery device 190. Each controldevice may calculate the RSSIs of each respective discovery messagereceived. The system controller 160 and/or the network device 128 mayorganize the control devices according to the received signal strengthindicators (RSSIs) of each respective discovery message received.

The transmission of the discovery message may be triggered by actuationof a button on the load control discovery device 190 and/or receipt of adiscovery trigger message. For example, the load control discoverydevice 190 may be identified as remote control device 116 or one of thecontrol modules 120 a, 120 b, 120 c, 120 d. The user 132 may actuate abutton (e.g., for a predefined period of time) or a sequence of buttonsto transmit the discovery message.

The transmission of the discovery message may be performed by sensors inthe load control system 100. For example, the load control discoverydevice may be an occupancy sensor on one of the control modules 120 a,120 b, 120 c, 120 d that may transmit digital messages uponidentification of an occupancy condition (e.g., occupied room) and/or avacancy condition (e.g., unoccupied room). The occupancy conditionand/or the vacancy condition may be interpreted by other devices as adiscovery message (e.g., when the devices are in a discovery mode). Auser may enter or leave a room to trigger transmission of a discoverymessage in a location of the occupancy sensor to discover devices inthat location.

The control devices may transmit a digital message to the systemcontroller 160 to acknowledge receipt of the discovery message. Thedigital messages may include the device identifier of the load controldiscovery device 190 and/or a signal strength at which the discoverymessage was received. The digital messages may be sent to the systemcontroller 160 in response to a request from the system controller 160(e.g., after the system controller 160 receives the discovery messageitself). The request from the system controller 160 may include arequest to acknowledge receipt of a message from a device having thedevice identifier of the load control discovery device 190 and/or thereceived signal strength of the message.

The system controller 160 may provide the discovered devices to thenetwork device 128 for display to the user 132. The system controller160 may organize the discovered devices for display to the user 132 forperforming association. The system controller 160 may organize thediscovered control devices in an organized dataset (e.g., ascending ordescending list) that is organized by the signal strength at which thediscovery message was received at each device. The system controller 160may remove any devices from the dataset that receive the discoverymessage at a signal strength below a predefined threshold (e.g., thereception power threshold). The system controller 160 may include apredefined number of devices in the dataset that have the greatestsignal strength. The system controller 160 may send the organizeddataset to the network device 128 for displaying to the user 132.

The user 132 may select control devices (e.g., lighting control devicesin the lighting fixtures 138 a, 138 b, 138 c, 138 d) from the discovereddevices displayed on the network device 128. The selected controldevices may be associated with the load control discovery device 190that was used to discover the control devices with the discovery range134. The network device 128 may generate association informationregarding the load control discovery device 190 and the selected controldevices in response to the inputs received from the user 132. Theselected control devices may also be associated with a control device(e.g., a control-source device) other than the load control discoverydevice 190.

The network device 128 may transmit the association information to thesystem controller 160 (e.g., upon actuation of a button by the user132). The system controller 160 may store the updated associationinformation thereon. The system controller 160 may transmit theassociation information to the control devices to update the associationinformation stored at the control devices.

FIGS. 2A and 2B are perspective views depicting an example controlmodule 200 for a lighting control device, which may be deployed as thecontrol modules 120 a, 120 b, 120 c, 120 d shown in FIG. 1. The controlmodule 200 may be configured to attach to a lighting fixture andelectrically connect to different types of lighting control devices,such as different types of LED drivers, for example. The control module200 may be electrically connected to the lighting control device (e.g.,via a wired communication link and/or control link) to enable control ofthe lighting control device in response to information provided from thecontrol module 200. The control module 200 may comprise a controlcircuit for controlling the operation of the control module.

The control module 200 may be mounted to a lighting fixture. Forexample, the control module 200 may include a clip 204 configured forattachment to a lighting fixture. The clip 204 may be located on a sideportion of the control module 200. The clip 204 may be received by thelighting fixture for locking the control module 200 into a receivingportion (e.g., an opening) of the lighting fixture.

The control module 200 may be configured with an occupancy sensor lens202. The occupancy sensor lens 202 may be made of at least a partiallyinfrared or visible light transparent material to allow an occupancysensing circuit 402 (FIG. 4) installed behind the occupancy sensing lens202 to detect motion (e.g., occupancy and/or vacancy conditions) in thevisible area of a load control environment. For example, the occupancysensing circuit 402 may be a passive infrared (PIR) sensor capable ofsensing infrared energy in the load control environment or a cameracapable of identifying motion in the load control environment. Theoccupancy sensor lens 202 may be located on a front cover portion 207located on a front side of the control module 200 to allow the occupancysensing circuit 402 to detect occupancy/vacancy conditions in the loadcontrol environment beneath the lighting fixture to which the controlmodule 200 may be attached.

The control module 200 may be configured with a light pipe 208, whichmay be made of a light-transmissive material, such as clear plastic. Thelight pipe 208 may be configured to receive light (e.g., daylight) froma load control environment and conduct the light to a light sensingcircuit, e.g., a daylight sensing circuit 604 (FIG. 6A), such as aphotosensor or a photodiode, located inside the control module 200. Thelight pipe 208 may have a front surface 208 c (e.g., a lens portion)located on the front cover portion 207 of the control module 200 forallowing light to enter the control module 200. The light pipe 208 mayalso comprise a first conductive portion 208 a for conducting the lightto the daylight sensing circuit 604 to allow for the daylight sensingcircuit to measure an amount of daylight in the load control environmentbeneath the lighting fixture to which the control module 200 may beattached.

The light pipe 208 may comprise a second conductive portion 208 bconfigured to transmit light from a feedback LED 602 (FIG. 6A) locatedinside of the control module 200 to the front surface 208 c to providefeedback to a user. For example, the light pipe 208 may provide feedback(e.g., by flashing the feedback LED 602 in one or more colors) tocommunicate information during configuration of the control module 200(e.g., to indicate when the control module is in an association mode ora discovery mode) and/or during normal operation to indicate a status ofthe control module and/or the load being controlled by the controlmodule 200 (e.g., a fault condition, such as a failed lamp). The frontsurface 208 c of the light pipe 208 may be located on the front coverportion 207 of the control module 200 to allow for an occupant of theload control environment to see the feedback.

The control module 200 may include a configuration button 206. Actuationof the configuration button 206 may enable programming of the controlmodule and/or the lighting control device to which the control module isconnected. For example, the actuation of the configuration button 206may put the control module 200, and/or the lighting control device towhich the control module 200 is connected, in an association mode or adiscovery mode. In the association mode, the control module 200 and/orthe lighting control device may transmit and/or receive associationmessages for being associated with other devices. In the discovery mode,the control module 200 and/or the lighting control device may transmitand/or respond to discovery messages for being discovered with otherdevices. In addition, the control module 200 may be configured to changea communication frequency at which RF signals (e.g., the RF signals 172)are transmitted and/or received in response to actuations of theconfiguration button 206. Further, the control module 200 may beconfigured to restore the control module 200 to an initial setting(e.g., to factory defaults) in response to actuations of theconfiguration button 206.

The configuration button 206 may be located on the front cover portion207 of the control module 200 to allow for access by an occupant of theload control environment. The configuration button 206 may be surroundedby the light pipe 208. For example, the configuration button 206 may besurrounded by the light pipe 208 to conserve space on the front coverportion 207 of the control module 200.

As shown in FIG. 2B, the control module 200 may include programmingcontacts 210. The programming contacts 210 may be used to program amemory of the control circuit with programming information duringmanufacturing of the control module and/or in the field. For example,the control module 200 may use the programming information stored in thememory to determine the digital messages to send to the lighting controldevice to which the control module 200 is connected. In addition, theprogramming information may include the lighting levels to which tocontrol the LED load controlled by the lighting control device inresponse to input signals received by the control module 200. The inputsignals may be occupancy/vacancy conditions sensed by the control module200, daylight levels sensed by the control module 200, RF signalsreceived by the control module 200, and/or other input signals receivedby the control module 200. The programming contacts 210 may also, oralternatively, test the programmed functions of the control module 200(e.g., as part of an end-of-line test during manufacturing of thecontrol module 200).

The programming contacts 210 may be received through a rear coverportion 209 located on a rear side of the control module 200. Theprogramming contacts 210 may be visible through the rear cover portion209 of the control module to enable programming of the control moduleprior to installation. After the control module 200 is installed in thelighting fixture, the programming contacts 210 may be hidden orinaccessible (e.g., covered by a label) to prevent the programming frombeing modified without disconnecting the control module 200 from thelighting fixture.

The control module 200 may include a communication link connector 212.The communication link connector 212 may be configured to receive aconnection for a wired communication link and/or control link (e.g., aDigital Addressable Lighting Interface (DALI) communication link, aLUTRON® ECOSYSTEM® communication link, or another wired digitalcommunication link) that may be connected to the LED driver of thelighting fixture. The communication link connector 212 may be located ina receded side portion 211 of the control module 200. The receded sideportion 211 may enable the connection for the communication link to beconnected to the control module 200 without extending beyond the rearcover portion 209 of the control module 200. Alternatively to includinga communication link connector 212, the control module 200 may includeone or more wires. For example, the control module 200 may include wiresthat are soldered or otherwise electrically attached to the controlmodule and which may insert through the back cover portion 209 when thecontrol module 200 is installed in a fixture. The wires and/or thecommunication link connector 212 may be connected to a differentialfilter to remove or reduce noise coupling into the circuit of 404A. Forexample, the wires and/or the communication link connector 212 may beconnected to a low-pass filter to remove common-mode noise.

The front cover portion 207 of the control module 200 may include a lip214. The lip 214 may be configured to rest against the edge of thefixture, such that the front cover portion 207 extends below thefixture. The clip 204 may be located at a position on a side portion ofthe control module 200 that connects to the receiving portion of thelighting fixture such that the lip 214 rests against the edge of thefixture.

FIGS. 3A-3F are orthographic views depicting different sides of theexample control module 200 shown in FIGS. 2A and 2B. As shown in FIG.3A, a first side of the front cover portion 207 may include theoccupancy sensor lens 202 and a second side of the front cover portion207 may include the light pipe 208. The configuration button 206 may beon the same side as the light pipe 208 (e.g., surrounded by the lightpipe). FIG. 3A also illustrates the position at which the cross-section302 was taken for the cross-section view shown in FIG. 4.

As shown in FIGS. 3B-3E, the occupancy sensor lens 202 may extendconvexly from the front cover portion 207 to increase visibility to theoccupancy sensor within the load control environment. For example, apassive infrared (PIR) occupancy sensor may use a Fresnel lens. Inanother example, a camera occupancy sensor may use a fisheye lens. Afirst side of the control module 200, shown in FIG. 3B, may include theclip 204 configured for attachment to a lighting fixture. The same sideof the control module 200 may include the communication link connector212.

As shown in FIG. 3F, the rear cover portion 209 may also be affixed tothe front cover portion 207 with a screw 318. The screw 318 may bereceived through the rear cover portion 209 and may be received on arear side of the front cover portion 207.

FIG. 4 is an enlarged side cross-section view of the example controlmodule 200 shown in FIGS. 2A and 2B. As shown in FIG. 4, the controlmodule 200 may include a printed circuit board (PCB) assembly 404. ThePCB assembly 404 may include a main PCB 404 a and/or a sensor PCB 404 b.The main PCB 404 a may be encased in the front cover portion 207 and therear cover portion 209. The main PCB 404 a may be mounted verticallyextending from the front cover portion 207 of the control module 200 tothe rear cover portion 209 of the control module 200. One or moresensors of the control module 200 may be mounted to the sensor PCB 404b. The sensor PCB 404 b may be configured to be installed at a rightangle perpendicular to the main PCB 404 a. The sensor PCB 404 b may beinstalled perpendicular to the main PCB 404 a to allow the sensorsconnected thereto to face the front side of the control module 200.

The main PCB 404 a may include main processing portions and/orinput/output connectors for the control module. For example, the mainPCB 404 a may include a processor 412 (FIG. 6C) of the control circuit,an RF transceiver integrated circuit 414, and/or the communication linkconnector 212. The control circuit may perform the primary controlfunctions for the control module 200.

The control circuit may generate digital messages for controlling thelighting control device (e.g., LED driver) to which the control module200 is connected (e.g., via the communication link connector 212) inresponse to sensor information received from the sensors connectedthereto. The sensor PCB 404 b may include the occupancy sensing circuit402 and/or the daylight sensing circuit 604. The occupancy sensingcircuit 402 may be a passive infrared (PIR) sensor capable ofidentifying a change in infrared energy received through the occupancysensor lens 202 on the front cover portion 207 of the control module200. The daylight sensing circuit 604 may be a photosensor, aphotodiode, camera, or other circuit for sensing daylight levels. Thedaylight sensing circuit 604 may be located on the sensor PCB 404 badjacent to the first conductive portion 208 a of the light pipe 604 andfacing the front portion 207 of the control module 200. The feedback LED602 may be located on the sensor PCB 404 b adjacent to the secondconductive portion 208 b of the light pipe 604 and facing the frontportion 207 of the control module 200.

The main PCB 404 a may include a wireless communication circuit capableof communicating wirelessly via an antenna 408. The antenna 408 may be astandard loop antenna capable of transmitting and/or receiving radiofrequency (RF) communication signals (e.g., near field communication(NFC) signals; BLUETOOTH® signals; WI-FI® signals; ZIGBEE® signals, aproprietary communication signals, such as CLEAR CONNECT™, etc.). Theloop antenna 408 may have a first end that is grounded and a second endthat is connected to the wireless communication circuit on the main PCB404 a.

The loop antenna 408 may be located on the main PCB 404 a, such that theloop antenna 408 is located substantially toward the front cover portion207 of the control module 200 and adjacent to a bottom edge 409 of themain PCB 404 a. The loop antenna 408 may be located on the main PCB 404a, such that at least a portion (e.g., the majority) of thetransmit/receive portions of the loop antenna 408 are located below abottom plane P1 tangential to the lip 214, which abuts a bottom of themetal lighting fixture after attachment. The control module 200 may beattached to the lighting fixture such that the lip 214 rests against thebottom edge of the metal fixture. The location of the transmit/receiveportions of the loop antenna 408 may allow for greatertransmission/reception of RF signals, as at least a portion of thetransmit/receive portions of the loop antenna 408 may be located withinthe plastic lip 214 of the front cover portion 207 of the control module200. The transmit/receive portions of the loop antenna 408 may alsocomprise an edge-plated conductive trace (not shown) on the bottom edge409 of the main PCB 404 a.

FIG. 5 is a partially exploded view of the example control module 200shown in FIGS. 2A and 2B. As shown in FIG. 5, the front cover portion207 of the control module 200 may receive the occupancy sensor lens 202from the direction R in a first opening 504. The front cover portion 207of the control module 200 may receive the occupancy sensing circuit 402in the first opening 504 from the direction F. The front cover portion207 of the control module 200 may receive the light pipe 208 in a secondopening 506 from the direction F. The front cover portion 207 may bepointed down into the load control environment when the control module200 is mounted to the lighting fixture (e.g., the direction F may bepointed downwards).

The occupancy sensing circuit 402 may have one or more leads 530. Theleads 530 may be configured to insert into the sensor PCB 404 b. Theleads 530 may electrically connect the occupancy sensing circuit 402 tothe sensor PCB 404 b. The leads may further be surrounded by aconductive shield 518. The conductive shield 518 may prevent radiofrequency interference from coupling into the occupancy sensing circuit402 via the leads 530. The occupancy sensing circuit 402 may be spacedapart from the sensor PCB 404 b by a distance D1. The distance D1, forexample, may be approximately equal to the height of the conductiveenclosure 518, such that the conductive enclosure 518 fully surroundsthe leads 530.

The light pipe 208 may include the light pipe portion 208 a for thedaylight sensing circuit (e.g., photodetector) and/or the light pipeportion 208 b for the feedback LED. The light pipe 208 may be supportedon the PCB assembly 404 by a support leg 502. For example, the supportleg 502 may be attached to the light pipe 208 and rest on a portion ofthe sensor PCB 404 b facing the direction F.

The configuration button 206 may be received in a central opening of thelight pipe 208 from the direction F. The configuration button 206 may besupported on the PCB assembly 404 by a support post 508. For example,the support post 508 may be attached to the configuration button 206 andrest on a portion of the sensor PCB 404 b facing the direction F. Thesupport post 508 may be affixed to the configuration button 206 by aspring arm 510. The spring arm 510 may be made of a flexible material(e.g., plastic, metal, etc.) that allows the configuration button 206 tobe actuated (e.g., pressed) while resting in the opening 506. Theactuation of the configuration button 206 may cause an actuation post512 extending from the rear side of the configuration button 206 in thedirection R to actuate a mechanical tactile switch located on the sensorPCB 404 b. The actuation of the configuration button 206 may cause thecontrol module 200 and/or the lighting control device to which thecontrol module is connected to enter an association mode or a discoverymode.

Alternatively, the control module 200 may not comprise a light pipe 208for conducting light to the daylight sensing circuit 604. For example,the control module 200 may comprise a light-transmissive lens (e.g.,just the front surface 208 c of the light pipe 208) and may not includethe first conductive portion 208 a for conducting the light to thedaylight sensing circuit 604. In addition, the control module 200 maynot comprise the opening 506 for receiving the front surface 208 c ofthe light pipe 208, and the light pipe 208 may be positioned behind thefront cover portion 207 for conducting light that is transmitted throughthe front cover portion 207 to the daylight sensing circuit 604.Further, the control module 200 may simply comprise an opening in thefront cover portion 207 for allowing light to shine on the daylightsensing circuit 604 without the use of the light pipe 208 or a lens.

Foam pads 514 may apply force to the rear side of the sensor PCB 404 b.The foam pads 514 may rest on the rear cover portion 209 of the controlmodule 200. For example, one of the foam pads 514 may rest on a ledge516 that may be located behind the occupancy sensing circuit 402 on thesensor PCB 404 b. The foam pads 514 may push the sensor PCB 404 bforward in the direction F (e.g., toward the front cover portion 207 ofthe control module 200) to improve sensor performance. The foam pads 514may push the daylight sensing circuit 604 closer to the first conductiveportion 208 a of the light pipe 208 to receive a greater amount of light(e.g., daylight) from the load control environment. The foam pads 514may push the occupancy sensing circuit 402 closer to the occupancysensor lens 202 to ensure that the occupancy sensing circuit 402 is ableto detect motion in the load control environment. One or more of thefoam pads 514 may be located on the reverse side of the sensor PCB 404 bbehind the occupancy sensing circuit 402. One or more of the foam pads514 may be located on the reverse side of the sensor PCB 404 b behindthe daylight sensing circuit 604 and the light pipe 208.

FIGS. 6A-6C are perspective views depicting the example control module200, shown in FIGS. 2A and 2B, without the front cover portion 207 orthe rear cover portion 209. As shown in FIG. 6A, the sensor PCB 404 bmay have attached thereto the occupancy sensing circuit 402 and thedaylight sensing circuit 604 (e.g., a photodiode). The daylight sensingcircuit 604 may be located proximate the light pipe portion 208 a toreceive daylight from the light pipe portion 208 a. The feedback LED 602may be located proximate the light pipe portion 208 b to provide LEDsignals via the light pipe portion 208 b.

The sensor PCB 404 b may be affixed to the main PCB 404 a in aperpendicular direction. The sensor PCB 404 b may be electricallyconnected to the main PCB 404 a via a surface mount plug/socket pair606. The sensor PCB 404 b may communicate sensor information to the mainPCB 404 a via the surface mount plug/socket pair 606.

The control circuit on the main PCB 404 a may process the sensorinformation (e.g., from the occupancy sensing circuit 402 and/or thedaylight sensing circuit 604) to generate control instructions forcontrolling a lighting control device electrically connected thereto.For example, the control circuit may generate control instructions thatare communicated to the LED driver via the communication link connector212, which may electrically connect the control module 200 to the LEDdriver or another lighting control device. The control instructions maybe programmed via use of the programming contacts 210.

The control circuit may also, or alternatively, perform processingand/or communicate with the lighting control device in response to otherinformation. For example, the main PCB 404 a may have installed thereonthe loop antenna 408, which may receive RF communications forprogramming the control module 200 and/or the lighting control deviceconnected thereto. The digital messages may cause the control module 200and/or the lighting control device connected thereto to enter anassociation mode and/or a discovery mode. The control circuit mayreceive control instructions via the loop antenna 408 for controllingthe lighting control device connected thereto.

As shown in FIG. 6B, the main PCB 404 a and the sensor PCB 404 b may beaffixed to one another with a first solder joint 608. The first solderjoint 608 may lock the main PCB 404 a and the sensor PCB 404 b together.The first solder joint 608 may be located a distance D1 from the surfacemount plug/socket pair 606 to support the electrical connection betweenthe main PCB 404 a and the sensor PCB 404 b. The main PCB 404 a and thesensor PCB 404 b may also be affixed to one another with a second solderjoint 609 as shown in FIG. 6C. In addition, the sensor PCB 404 b maycomprise a tab 620 that may be received by an opening 614 in the mainPCB 404 a and soldered to a pad 615 to further affix the main PCB 404 ato the sensor PCB 404 b.

The areas 610, 612 may be locations on the sensor PCB 404 b at which thefoam pads 515 shown in FIG. 5 may rest. The area 610 may be locatedbehind the light pipe 208, the configuration button 206, and/or thesupport post 508. The area 612 may be located behind the occupancysensing circuit 402 and/or the support leg 502.

The occupancy sensor circuit 402 may further include a conductive shield518, which may be the same as conductive shield 518 shown in FIG. 5. Theconductive shield 518 may surround one or more pins of the occupancysensor circuit when the occupancy sensor circuit 402 is spaced at aheight off of the sensor PCB 404 b. The conductive shield 518 may bemade of metal or any other suitable conductive material, such asconductive rubber, conductive plastic, etc. For example, the conductiveshield 518 may surround the pins of the occupancy sensor circuit 402,without touching the pins. The conductive shield 518 may make electricalcontact with a housing of the occupancy sensor circuit 402. Theconductive shield 518 may prevent and/or reduce an amount of radiofrequency interference (RFI) from coupling to, and interfering with, theoccupancy sensor circuit 402.

As shown in FIGS. 6B and 6C, the programming contacts 210 may beedge-plated conductive pads on the side the main PCB 404 a. Theprogramming contacts 210 may be arranged on the side of the main PCB 404a to be received through the rear cover portion 209 located on the rearside of the control module 200.

While the front cover portion 207 of the control module 200 shown anddescribed herein has a “racetrack” shape with linear portions betweencircular side edges (e.g., as shown in FIG. 3A), the front cover portion207 may also have a different shape. For example, the front coverportion 207 of the control module 200 may be a rectangular shape (e.g.,as shown on a front cover portion 207′ of a control module 200′ in FIG.6D), a square shape, a circular shape, an oval shape, or any suitableshape. In addition, the front cover portion 207 of the control module200 may be planar or non-planar, and/or may be characterized by variouscolors, finishes, designs, patterns, etc. Further, the front surface 208c of the light pipe 208 and the configuration button 206 may each have anon-circular shape, such as, a rectangular shape, a square shape, anoval shape, or other suitable shape.

FIGS. 7A and 7B are perspective views of an example control module 700installed inside a conductive enclosure 720. The control module 700 maybe the same as, or similar to, control module 200 shown in FIG. 2. Forexample, the control module 700 may contain an occupancy sensor lens702, a configuration button 706, a light pipe 708, one or more clips704, and a front cover portion 707 having a lip 714, which may besimilar to or the same as the corresponding elements 202, 206, 208, 204,207, and 214, respectively, as previously described.

The control module 700 may be configured to be inserted into theconductive enclosure 720 before being installed into a lighting fixture(e.g., a metal lighting fixture). The conductive enclosure 720 may bemade of metal, conductive plastic, or other conductive material. Theconductive enclosure 720 may act as a shield (e.g., an electromagneticor radio-frequency shield) to prevent or reduce an amount ofradio-frequency interference (RFI) noise received by an antenna of thecontrol module 700. For example, the antenna may be located within thefront cover portion 707 of the control module 700 (e.g., as in thecontrol module 100). The conductive enclosure 720 may make electricalcontact with the metal lighting fixture to prevent RFI from couplinginto the antenna of the control module 700. For example, the conductiveenclosure 720 may prevent RFI noise generated inside the metal lightingfixture (e.g., from the lighting control device) from coupling into theantenna of the control module 700.

The control module 700 may be inserted into the conductive enclosure 720and may be secured to the conductive enclosure 720 by one or moremechanical attachment mechanisms. For example, the conductive enclosure720 may be attached to the control module 700 via one or more screws728. Alternatively, the conductive enclosure 720 may be attached to thecontrol module 700 via any of the following methods: snaps, heat stakes,rivets, adhesive materials, magnets, and the like. The conductiveenclosure 720 and control module 700 assembly may then be installed in alighting fixture. For example, the conductive enclosure 720 and thecontrol module 700 may be snapped into the lighting fixture.Alternatively, the conductive enclosure 720 may first be installed inthe lighting fixture, and the control module 700 may then be assembledor attached to the conductive enclosure 720 in the lighting fixture,using any of the mechanical adherence mechanisms previously described.

FIGS. 8A and 8B are partially exploded view of the example controlmodule 700 and the conductive enclosure 720 shown in FIGS. 7A and 7B.FIGS. 8A and 8B show the control module 700 depicted with the conductiveenclosure 720 removed and the screws 728 uninstalled. The conductiveenclosure 720 may include one or more apertures 808. Similarly, thecontrol module 700 may contain one or more apertures 806. The screws 728may insert through one or more apertures 808 in the conductive enclosure720 to one or more apertures 806 in the control module 700 to fasten theconductive enclosure 720 to the control module 700, as shown in FIG. 8B.

The control module 700 may further comprise an aperture 804 located onthe back cover portion of the control module, through which one or morewires may extend, as previously described. The wires may further extendthrough the corresponding aperture 810 on the conductive enclosure 720when the conductive enclosure 720 is attached to the control module 700.

FIGS. 9A-9D are orthographic views depicting different sides of theconductive enclosure 720 shown in FIGS. 7A and 7B. FIG. 9A is a bottomview of the conductive enclosure 720. FIG. 9B is a front side view ofthe conductive enclosure 720. FIGS. 9C and 9D are left-side andright-side views of the conductive enclosure 720, respectively.

The conductive enclosure 720 may comprise one or more flanges 726A, 726Bthat are configured to abut the lip 714 of the control module 700 whenthe conductive enclosure 720 is installed on the control module 700.FIG. 8A shows a first side 816 of the flanges 726A, 726B and FIG. 8Bshows a second side 818 of the flanges 726A, 726B. The flanges 726A,726B may also be configured to abut the metal lighting fixture when thecontrol module 700 and the conductive enclosure 720 are installed in themetal lighting fixture.

The flanges 726A, 726B may be configured to abut the lip 714 of thefront cover portion 707 on the first side 816, as shown in FIG. 8A. Theflanges 726A, 726B may be configured to abut a metal lighting fixture onthe second side 818, as shown in FIG. 8B, when the conductive enclosure720 and the control module 700 are installed in the metal lightingfixture. For example, the flanges 726A may be continuous around thecurved end portions of the perimeter of the conductive enclosure 720.The flanges 726B may cover one or more straight portions of theperimeter of the conductive enclosure 720. For example, the flanges 726Aand 726B maybe be separated by one or more gaps to allow room for theclips 704 of the control module 700. For example, the flange 726A may beseparated from the flange 726B by the gap 802 as shown in FIG. 8A.

The RFI noise may couple into the antenna of the control module 700through the one or more gaps between the metal lighting fixture and theconductive enclosure 720. The flanges 726A, 726B may operate to maximizethe surface area of the conductive enclosure 720 that contacts the metallighting fixture, or reduce the amount of length along a perimeter ofthe conductive enclosure 720 that does not contact the metal lightingfixture. That is, the flanges 726A, 726B may reduce a length of one ormore gaps, such as gap 802, which may reduce an amount of RFI noisecoupled into the antenna of the control module 700. The length of theone or more gaps 802 may be designed according to the frequency ofinterest of the RFI. The frequency of interest may be, for example, theradio-frequency of the antenna of the control module 700. For example, ahigher frequency of interest RFI noise, such as a frequency of 2.4 GHz,may be more effectively reduced using a shorter gap length compared to agap length required to reduce a lower frequency of interest RFI noise,such as a sub-GHz frequency.

The conductive enclosure 720 may further contain one or more springs722A, 722B. For example, the springs 722A, 722B may be teeth, fins orother portions of the conductive enclosure. The springs 722A may belocated adjacent to respective ends of the outer curved flanges 726A,while the springs 722B may be located adjacent to respective reliefcutouts 730 next to the straight flanges 726B. The springs 722A, 722B ofthe conductive enclosure 720 maybe be located on either side of theclips 704 of the control module 700. The conductive enclosure maycomprise additional springs along the perimeter of the enclosure.

The springs 722A, 722B may be angled outwardly from sides 732 of theconductive enclosure 720. For example, the springs 722A may bend outwardfrom the sides 732 of the conductive enclosure 720 by an angle A asshown in FIG. 8B. The springs 722B may bend outward from the sides 732of the conductive enclosure 720 by an angle B as shown in FIG. 8B. Theangle A may be less than the angle B. For example, the angle A may beapproximately 28 degrees, while the angle B may be 45 degrees. When theconductive enclosure is installed in the metal lighting fixture, thesprings 722A, 722B may be configured to bend (e.g., compress) towardsthe side of the conductive enclosure and to provide a spring force tohold the conductive enclosure 720 against the metal fixture. The springs722A, 722B may be configured to hold the conductive enclosure 720 (andthereby the control module 700) against the metal lighting fixture whenthe conductive enclosure 720 is installed in the metal fixture.

The springs 722A, 722B may each have the same (or similar) geometries.Alternatively, the springs 722A may have a slightly different geometrythan springs 722B. For example, the springs 722A may have a geometrythat allows the springs 722A to be stiffer than the springs 722B. Forexample, each spring 722A may be located adjacent to the flange 726A andmay bend around an axis 740. Each spring 722B may be located adjacent toone of the relief cutouts 730 and may bend around an axis 742. Thesprings 722B may bend more easily around the axes 742 than the springs722A bend around the axes 740. The relief cutouts 730 may allow therespective springs 722B to bend around the axes 742 when the springs722B are compressed by the metal lighting fixture, without deformationof the flanges 726B. The springs 722A may be stiffer (e.g., may have ahigher spring constant) than the springs 722B, due to the differences inthe axes 740, 742 of the springs 722A, 722B.

One will understand that the angles A, B and the number of springs shownand described in the embodiments herein are for illustrative purposesonly, and that the invention is not limited to the number of springsshown nor the specific angles described. Further, adding additionalsprings to the conductive enclosure 720 may improve the adherence of theconductive enclosure to the metal lighting fixture and may furtherreduce an amount of RFI coupled into the antenna of the control module700. However, additional springs may also increase an amount of forcerequired to install the conductive enclosure in the metal fixture andmay further increase the number of gaps between the conductive enclosure720 and the metal fixture, which may allow additional RFI noise to becoupled to the antenna of the control module 700.

Each of the springs 722A, 722B may contain a respective edge cut 724,for example, a chamfer cut. The edge cut 724 may be a reverse angle edgecut. Each of the edge cuts 724 of the springs 722A, 722B may act asteeth, that is, the edge cuts 724 may allow the conductive enclosure 720to drive into the metal fixture during installation. The edge cuts 724,in combination with the springs 722A, 722B may act to hold theconductive enclosure 720 tight to the metal lighting fixture. Each edgecut 724 may be angled away from a top edge of the respective spring722A, 722B by an angle C, as shown in FIG. 8A. For example, the angle Cof each of the edge cuts 724 on the springs 722A, 722B may beapproximately 60 degrees.

In some applications, the metal fixture may contain a non-conductivecoating, such as paint or powder coating. The springs 722A, 722B withedge cut 724 may act to scrape away all or part of the non-conductivesurface coating on the metal lighting fixture in a contact area betweenthe edge cut 724 and the metal fixture. In this way, the edge cut 724may improve the conductivity of the contact between the conductiveenclosure and the metal lighting fixture. Although the edge cut 724 hasbeen described as having an angle C of 60 degrees, one will understandthat the angle C is not limited to 60 degrees, but may be any otherangle that provides the same result. For example, the angle C of thereverse angle edge cut may be optimized based on a thickness of thesheet metal of the fixture.

FIG. 10 is a block diagram of an example control module 1000, which maybe similar to the control module 200 described herein, connected to alighting control device 1050. The control module 1000 may be connectedto the lighting control device 1050 to perform sensing functions forcontrolling the lighting control device 1050 and/or to communicationwireless signals with external devices. The lighting control device 1050may be an LED driver for LED light sources, an electronic ballast forlamps, or other lighting control device. The control module 1000 may beconfigured to connect to different types of lighting control devices,such as different types of LED drivers, for example. The control module1000 and the lighting control device 1050 may be mounted in the samefixture. For example, the control module 1000 may be configured to mountto a fixture in which the lighting control device 1050 may be installed.

The control module 1000 may be electrically connected to the lightingcontrol device 1050 via a communication bus 1030. The communication bus1030 may be a Digital Addressable Lighting Interface (DALI)communication link, a LUTRON® ECOSYSTEM® communication link, or anotherwired communication link. The communication bus 1030 may be connected tothe control module 1000 and/or the lighting control device 1050 via acommunication link connector, which may be similar to the communicationlink connector 212 described herein. The control module 1000 may sendcontrol signals via the communication bus 1030 to control the lightingcontrol device 1050.

The control module 1000 may include a module control circuit 1002, whichmay be similar to the control circuit of the control module 200described herein, for controlling the functionality of the controlmodule 1000. The module control circuit 1002 may process informationreceived as input and generate messages for being communicated via thecommunication bus 1030 to the lighting control device 1050. The modulecontrol circuit 1002 may include one or more general purpose processors,special purpose processors, conventional processors, digital signalprocessors (DSPs), microprocessors, integrated circuits, a programmablelogic device (PLD), application specific integrated circuits (ASICs), orthe like. The module control circuit 1002 may perform signal coding,data processing, power control, input/output processing, or any otherfunctionality that enables the module control circuit 1002 to perform asdescribed herein.

The module control circuit 1002 may store information in and/or retrieveinformation from the memory 1018. For example, the memory 1018 maymaintain a registry of associated control devices. The memory 1018 mayinclude a non-removable memory and/or a removable memory.

The control module 1000 may include a daylight sensing circuit 1004,which may be similar to the daylight sensing circuit 604 describedherein. The daylight sensing circuit 1004 may be configured to measure alight intensity in the visible area of the daylight sensing circuit1004. The daylight sensing circuit 1004 may transmit digital messages tothe module control circuit 1002 that include the measured lightintensity.

The control module 1000 may include an occupancy sensing circuit 1006,which may be similar to the occupancy sensing circuit 402 describedherein. The occupancy sensing circuit 1006 may be configured to detectmotion (e.g., occupancy and/or vacancy conditions) in the visible areaof the occupancy sensing circuit 1006. Examples of the occupancy sensingcircuit 1006 may include a passive infrared (IR) sensor capable ofsensing infrared energy in the load control environment or a cameracapable of identifying motion in the load control environment. Theoccupancy sensing circuit 1006 may transmit digital messages to themodule control circuit 1002 that include the occupancy or vacancyconditions. The occupancy sensing circuit 1006 may operate as a vacancysensing circuit, such that digital messages are transmitted in responseto detecting a vacancy condition (e.g., digital messages may not betransmitted in response to detecting an occupancy condition).

The module control circuit 1002 may be in communication with one or moreactuators, such as actuator 712 (e.g., configuration button 206). Theactuator 712 may include one or more buttons for receiving input (e.g.,an indication that a button has been actuated) at the control module1000. The control module 1000 may receive inputs from the actuator 712to put the module control circuit 1002 in an association mode or adiscovery mode as described herein. The control module 1000 may alsocomprise a programming interface 1015, which may be similar to theprogramming contacts 210 described herein. For example, the modulecontrol circuit 1002 may receive inputs from the programming interface1015 to program and/or test the control module 1000. For example, themodule control circuit 1002 may receive inputs from the programminginterface 1015 to program the memory 1018 with programming informationregarding the digital messages to be sent to the lighting control devicein response to inputs received from the daylight sensing circuit 1004,the actuator 712, the occupancy sensing circuit 1006, and/or thewireless communication circuit 1010.

The control module 1000 may include a wireless communications circuit1010, which may operate via the loop antenna 408 described herein, fortransmitting and/or receiving information. The wireless communicationscircuit 1010 may transmit and/or receive information via a wirelesscommunications channel (e.g., near field communication (NFC);BLUETOOTH®; WI-FI®; ZIGBEE®, a proprietary communication channel, suchas CLEAR CONNECT™, etc.). The wireless communications circuit 1010 mayinclude a transmitter, an RF transceiver, or other circuit capable ofperforming wireless communications. The wireless communications circuit1010 may be in communication with module control circuit 1002 fortransmitting and/or receiving information.

The control module 1000 may include a wired communications circuit 1008.The wired communications circuit 1008 may transmit information to and/orreceive information from the lighting control device 1050 via thecommunication bus 1030. The wired communications circuit 1008 may be incommunication with module control circuit 1002 for transmitting and/orreceiving information via the communication bus 1030.

The communication bus 1030 may be powered by a bus power supply 1060.The bus power supply 1060 may receive power via the hot connection 1062and the neutral connection 1064 of an alternating current (AC) linevoltage and may provide an amount of power to the communication bus1030. The control module 1000 may comprise an internal power supply 1016for generating a direct-current (DC) supply voltage V_(CC) for poweringthe low-voltage circuitry of the control module 1000. The power supply1016 may receive power from the bus power supply 1060.

The communication bus 1030 may be connected to a wired communicationcircuit 1054 of the lighting control device 1050. The connection of thecommunication bus 1030 to the wired communication circuit 1054 mayenable the communication between the control module 1000 and thelighting control device 1050 to remain local (e.g., within a lightingfixture). The wired communications circuit 1054 may transmit informationto and/or receive information from the control module 1000 via thecommunication bus 1030.

The wired communications circuit 1054 may be in communication with adriver control circuit 1056 for transmitting and/or receivinginformation via the communication bus 1030. The driver control circuit1056 may include one or more general purpose processors, special purposeprocessors, conventional processors, digital signal processors (DSPs),microprocessors, integrated circuits, a programmable logic device (PLD),application specific integrated circuits (ASICs), or the like. Thedriver control circuit 1056 may perform signal coding, data processing,power control, input/output processing, or any other functionality thatenables the lighting control device 1050 to perform as described herein.

The driver control circuit 1056 may generate control instructions forcontrolling the LED 1050. The driver control circuit 1056 may send thecontrol instructions to a load control circuit 1052 for performing loadcontrol in response to the instructions. The load control circuit 1052may receive instructions from the driver control circuit 1056 and maycontrol the load 1058 (e.g., LED) based on the received instructions.The load control circuit 1052 may receive power via the hot connection1062 and the neutral connection 1064 of an alternating current (AC) linevoltage.

The load control circuit 1052 may send status feedback to the drivercontrol circuit 1056 regarding the status of the load 1058. The statusmay be communicated to the control module 1000 and communicated to auser via a feedback LED 714. The feedback LED 714 may be controlled(e.g., flashed) by the module control circuit 1002.

Although features and elements are described herein in particularcombinations, each feature or element can be used alone or in anycombination with the other features and elements. The methods describedherein may be implemented in a computer program, software, or firmwareincorporated in a computer-readable medium for execution by a computeror processor. Examples of computer-readable media include electronicsignals (transmitted over wired or wireless connections) andcomputer-readable storage media. Examples of computer-readable storagemedia include, but are not limited to, a read only memory (ROM), arandom access memory (RAM), removable disks, and optical media such asCD-ROM disks, and digital versatile disks (DVDs).

The invention claimed is:
 1. (canceled)
 2. A control module configuredto be installed in a metal lighting fixture, the control modulecomprising: a front cover portion comprising a lip configured to restagainst a bottom edge of the metal lighting fixture; a rear conductiveenclosure configured to be in electrical contact with the metal lightingfixture when the control module is installed in the lighting fixture; awireless communication circuit; and an antenna coupled to the wirelesscommunication circuit for communicating radio frequency communicationsignals via the wireless communication circuit; and wherein the antennaand the wireless communication circuit are disposed between the frontcover portion and the rear conductive enclosure.
 3. The control moduleof claim 2, wherein the rear conductive enclosure is made of metal orconductive plastic, and the front cover portion is made of plastic. 4.The control module of claim 3, wherein the rear conductive enclosure atleast partially shields the antenna from noise generated by the lightingcontrol device.
 5. The control module of claim 2, further comprising: afirst printed circuit board, the wireless communication circuit mountedto the first printed circuit board; and wherein the antenna is locatedon the first printed circuit board.
 6. The control module of claim 5,wherein the first printed circuit board extends from a front side of thecontrol module to a rear side of the control module such that a majorityof the antenna is contained within the lip.
 7. The control module ofclaim 6, further comprising a rear cover configured to insert into therear conductive enclosure.
 8. The control module of claim 7, wherein therear conductive enclosure comprises: at least one flange, the flangehaving a first side configured to abut a surface of the metal lightingfixture.
 9. The control module of claim 8, wherein the rear conductiveenclosure further comprises at least two spring members comprising areverse angle edge cut, wherein the at least two spring members areconfigured to compress when the control module is installed in the metallighting fixture.
 10. The control module of claim 9, wherein the reverseangle edge cut is configured to dig into a surface of the metal lightingfixture to provide an electrical connection to the metal lightingfixture.
 11. The control module of claim 9, wherein the reverse angleedge cut is configured to draw the control module closer to the metallighting fixture such that the at least one flange abuts the surface ofthe metal lighting fixture.
 12. The control module of claim 9, whereinthe reverse angle edge cut is at an angle of 60 degrees from the surfaceof the metal lighting fixture.
 13. The control module of claim 9,wherein the at least two spring members are bent away from the rearconductive enclosure at an angle of 45 degrees.
 14. The control moduleof claim 6, wherein the antenna comprises a loop antenna.
 15. Thecontrol module of claim 6, further comprising: a second printed circuitboard attached perpendicular to the first printed circuit board, thesecond printed circuit board having a sensing circuit mounted thereto,wherein the sensing circuit faces the front side of the control module.16. The control module of claim 15, wherein the sensing circuitcomprises an occupancy sensing circuit and a daylight sensing circuit.17. The control module of claim 16, wherein the front cover portioncomprises a lens that covers the occupancy sensing circuit.
 18. Thecontrol module of claim 16, wherein the front cover portion comprises alight pipe portion that receives light for the daylight sensing circuit.19. The control module of claim 15, wherein the sensing circuitcomprises a passive infrared sensor having one or more leads, furtherwherein the passive infrared sensor is mounted a distance away from thesecond printed circuit board and is electrically connected to the sensorprinted circuit board via the one or more leads such that the passiveinfrared sensor faces the front cover portion.
 20. The control module ofclaim 19, wherein the control module further comprises a conductiveshield around the one or more leads of the passive infrared sensor. 21.The control module of claim 2, wherein the front cover portion furthercomprises: a light pipe portion that provides feedback from a lightemitting diode; and a button surrounded by the light pipe portion;wherein actuation of the button enables programming of the controlmodule.